HR consultants are independent practitioners and small firms who help small and mid-sized businesses with work they don't have a full-time HR department for. Typical invoices cover employee handbook writing, compliance audits, hiring support, investigations, manager coaching, and ongoing advisory time.
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HR consultants most often bill hourly for advisory work, investigations, and ad hoc questions, and use flat project fees for defined deliverables like a handbook, a compensation study, or an I-9 audit. Many also sell monthly retainers that include a set number of hours, which gives the client predictable cost and gives you steady income. Recruiting support is sometimes priced as a percentage of first-year salary or a flat fee per hire. Training and workshops are usually priced per session or per attendee. Out-of-pocket costs such as background check fees, job board postings, survey software, and travel are typically passed through at cost or with a small markup that is stated up front. Rates depend heavily on certifications (PHR, SPHR, SHRM-CP, SHRM-SCP), legal background, and whether you work in a high-cost metro.
| Service | Priced | Typical range |
|---|---|---|
| General HR advisory | per hour | $100-225 |
| Employee handbook creation or rewrite | flat fee | $2,500-8,000 |
| Workplace investigation | per hour | $150-300 |
| I-9 or HR compliance audit | flat fee | $1,500-5,000 |
| Monthly HR retainer (small business) | per month | $750-3,500 |
| Job description and compensation review | flat fee | $2,000-7,500 |
| Manager or harassment prevention training | per session | $750-2,500 |
| Recruiting support | per hire (flat or % of salary) | $2,000-6,000 or 15-20% |
Typical US ranges. Rates vary by region, experience, and job size.
| Description | Qty | Rate | Amount |
|---|---|---|---|
| Employee handbook development (state-specific policies, 42 pages), per proposal dated March 3 | 1 flat fee | $4,500.00 | $4,500.00 |
| HR advisory: termination review and documentation guidance | 3.5 hours | $150.00 | $525.00 |
| Supervisor training: documentation and performance conversations (90 min, 12 attendees) | 1 session | $1,200.00 | $1,200.00 |
| Job descriptions for 5 positions | 5 each | $175.00 | $875.00 |
| Background check fees (pass-through at cost) | 3 each | $42.00 | $126.00 |
| Total | $7,226.00 | ||
Notes: Payment due within 15 days of invoice date. Handbook is delivered for client and legal counsel review; this invoice does not constitute legal advice. A 1.5% monthly late fee applies to balances past due. Accepted by ACH or check.
HR work often overlaps with legal questions; tying each line to a signed proposal or agreement keeps the scope clear and avoids disputes about what was included.
Clients reviewing advisory or investigation time want to see what was done and when, especially if the bill goes to an owner or board that wasn't involved day to day.
Shows whether the client is under or over their included hours and sets up a conversation about overages or upgrading the plan.
Background checks, job postings, survey tools, and travel should be itemized at cost or at your stated markup so clients can trace them.
Invoices get forwarded to accountants and bookkeepers. Describe an investigation as 'workplace investigation, matter 2024-03' rather than naming employees or details.
Large deliverables like handbooks and compensation studies are often billed in stages, so each invoice should show which milestone it covers.
If you are not an attorney, a short statement clarifies the limits of your role and encourages clients to consult counsel on legal questions.
Many HR consultants take a deposit of 25-50% on fixed-fee projects before starting and bill the balance on delivery or at milestones. Retainers are usually invoiced at the start of each month and are due on receipt or within 7 to 15 days. Hourly work is commonly billed monthly in arrears with net 15 or net 30 terms. Late fees of 1-1.5% per month are common if stated in the agreement. ACH and card payments are typical, and check is still used by some small employers. For investigations, some consultants require an upfront retainer that is drawn down as hours are billed.
Small businesses ask quick questions all month. A retainer with a set number of hours covers those calls and emails, and a defined overage rate prevents free work from creeping in.
State what the project includes, how many revision rounds are covered, and what happens if the client wants additional policies or states added. Handbooks in particular grow when the client has employees in more than one state.
Investigations can run long and clients may be stressed or in dispute with an employee. Collecting a retainer first and invoicing against it keeps payment from becoming a problem partway through.
Short calls and email reviews add up. Billing in 15-minute increments with a minimum, such as 30 minutes for any call, protects your time without feeling excessive.
Employment rules change, and your experience grows. Raise rates for new clients first, then give existing clients notice of 30 to 60 days before applying an increase.
Use hourly for open-ended work like advisory calls and investigations, and a flat fee for defined deliverables like a handbook or audit. If you use a flat fee, specify what is included and set an hourly rate for anything beyond scope.
Yes, if your agreement says so. Many consultants pass costs through at cost and list them as a separate line. If you add a markup, disclose it in the proposal so there are no surprises on the invoice.
Use a matter number and a general description rather than employee names or allegations. Detailed notes should stay in your own files, not on an invoice that others at the client company may see.
It depends on the state. Many states do not tax professional services, but a few tax some consulting or digital deliverables. Check with your state's revenue department or a tax professional.
Pause work as your agreement allows, send a written reminder with the overdue invoice, and offer a short payment plan if appropriate. Having a deposit and milestone billing reduces how much you are exposed at any point.
Send a HR Consultant estimate for approval, then turn it into an invoice when the work is done.
HR Consultant estimate template